M5Stack 10A 4-Relay Unit I2C Controlled

M5Stack

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SKU:
558-U097
MPN:
U097
M5Stack U097 4-channel I2C relay unit with STM32F030F4P6 and four high-voltage relay terminals
M5Stack U097 Unit 4Relay is a 4-channel I2C relay controller featuring an STM32F030F4P6 MCU, 250VAC/10A or 28VDC/10A switching, 16A instantaneous current capability, programmable LEDs, physical isolation, and Grove connectivity. View full description
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Technical Specifications

Brand:
M5Stack
MCU:
STM32F030F4P6
Max Input Voltage:
AC 250V / DC 28V
Rated Current:
10A
Max Instantaneous Current:
16A
Communication Interface:
I2C @0x26
Product Size:
112.0x23.0x18.0mm
Product Weight:
40.0g
Package Size:
163.0x100.0x20.0mm
Gross Weight:
84.0g

Warranty Information

All the products supplied by Evelta are genuine and original. We offer 14 days replacement warranty in case of manufacturing defects. For more details, please visit our cancellation and returns page.

Description

Resources:
Documents

4-Channel I2C Relay Unit with 250VAC/10A Switching and Programmable Status LEDs

The M5Stack U097 Unit 4Relay is a 4-channel high-voltage switching module designed for controlling AC and DC loads from M5Stack controllers. It uses an STM32F030F4P6 microcontroller and communicates with the host through I2C, allowing all four mechanical relays to be controlled independently while using only the shared I2C bus. Each channel supports loads up to 250VAC/10A or 28VDC/10A, with a maximum instantaneous current of 16A.

Each relay includes an independently programmable LED indicator, with support for manual LED control or automatic synchronisation with relay status. The module incorporates physical separation between the high-voltage relay section and low-voltage control circuitry and connects to the host through an HY2.0-4P Grove interface at the default I2C address 0x26. Two LEGO-compatible mounting holes simplify integration into control panels, smart-home systems, automation equipment, and high-power load-switching projects.

Key Features

  • 4-Channel Relay Control: Independently controls 4 mechanical relay channels
  • High-Voltage Switching: Supports up to 250VAC/10A or 28VDC/10A per relay
  • Instantaneous Current: Supports up to 16A maximum instantaneous current
  • STM32 Controller: Integrated STM32F030F4P6 microcontroller
  • I2C Interface: Communicates through I2C at default address 0x26
  • Programmable Indicators: Independent status LED for each relay channel
  • LED Modes: Supports manual LED control or automatic relay-status synchronisation
  • Physical Isolation: Separation between high-voltage and low-voltage circuit sections
  • Grove Connectivity: HY2.0-4P interface for M5Stack host connection
  • Mounting: 2 × LEGO-compatible mounting holes
  • Development Support: UiFlow1, UiFlow2, Arduino IDE, and Home Assistant integration.

Applications

  • Smart home load switching
  • Industrial control systems
  • Power management
  • Lighting control
  • Digital equipment power switching
  • Appliance automation
  • Pump and fan control
  • Remote load control
  • IoT automation systems
  • High-power equipment switching
  • Embedded relay controllers
  • Home Assistant automation

Model Size

Package Includes:

  • 1 x Unit 4Relay
  • 1 x HY2.0-4P Grove connection cable (20cm)
  • 4 x HT3.96-4P terminals

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